Rotary switch

Abstract

The invention relates to the field of mechanical electrical elements, in particular to a rotary switch which comprises a seat body, a rotary shaft, a driving magnet and an on-off structure, connection or disconnection of a contact is achieved through interaction of the driving magnet and the on-off structure, and the position of the rotary shaft can be locked through a positioning structure. The design utilizes a magnetic driving and resetting mechanism, ensures accurate and reliable switching, has the characteristics of compact structure and convenience in operation, and remarkably improves the working stability and the service life of the rotary switch. According to the invention, the effects of simplifying the switch structure, improving the response sensitivity and enhancing the use safety and convenience are achieved.

Description

Technical Field

[0001] This application relates to the field of mechanical and electrical components, and particularly to a rotary switch. Background Art

[0002] As a common electrical component, the rotary switch is widely used in modern industry and daily life. Whether it is household appliances or industrial equipment, the rotary switch plays a key role in controlling the on-off of the circuit. With the progress of technology, the design of the rotary switch has also undergone several innovations, evolving from the initial simple mechanical structure to the current complex device that combines multiple physical principles. This progress not only improves the performance of the product, but also significantly enhances its reliability and durability, providing a more efficient and stable solution for all walks of life.

[0003] Traditional rotary switches usually adopt a method of matching a common moving contact with multiple static contacts, such as the rotary switches disclosed in documents with publication numbers CN104008914A and CN106057543A. To achieve the multi-position switching function, the operating component is rotated manually or electrically, so that the moving contact contacts different static contacts in sequence, thereby completing the conversion between different positions. In addition, some designs introduce a spring reset mechanism or other auxiliary mechanisms to optimize the contact state of the contacts and ensure good electrical conductivity. At the same time, some products also try to use the lever principle or cam mechanism to improve the operation accuracy and feel feedback.

[0004] However, the above methods generally have a problem: since the moving contact needs to frequently contact, separate from, and relatively move with multiple other static contacts, relatively large frictional losses will inevitably occur. Over time, the wear degree of the moving contact far exceeds that of a single static contact, resulting in a serious impact on the overall life of the entire rotary switch. This limitation restricts its popularization and application in high-frequency usage scenarios, and it is urgent to seek a new design solution for improvement. Summary of the Invention

[0005] To reduce wear and improve the life, this application provides a rotary switch.

[0006] The rotary switch provided by this application adopts the following technical solutions: A rotary switch includes a base body, a rotating shaft, a driving magnet, and a switching structure. The rotating shaft is rotatably connected to the base body. The driving magnet is connected to the outer peripheral surface of the rotating shaft. There are multiple switching structures, and all the switching structures are distributed circumferentially along the rotating shaft. When the center of the on-off structure, the center of the driving magnet, and the axis of the rotating shaft are coplanar, and the center of the on-off structure and the center of the driving magnet are on the same side of the axis of the rotating shaft, the driving magnet makes the on-off structure conductive.

[0007] By adopting the above technical solution, there is no contact between the rotating shaft and the on-off structure. During the use of the rotary switch, there is no friction and wear between the rotating shaft and the on-off structure.

[0008] Each on-off structure is independent and has no common contact points, avoiding the friction and wear problems caused by the frequent switching of the common contact points between multiple gear contact points, which is beneficial to improving the service life of the rotary switch.

[0009] Preferably, the on-off structure includes a fixed contact, a movable contact, and a movable magnet. The fixed contact is connected to the base body. The movable contact is connected to the movable magnet. The movable magnet is slidably connected to the base body. When the movable magnet is affected by the magnetic force of the driving magnet, the movable contact touches the fixed contact.

[0010] By adopting the above technical solution, the rotating shaft is rotated so that the driving magnet faces the target on-off structure. The movable magnet of the target on-off structure moves under the action of the magnetic force and makes the movable contact touch the fixed contact, then the target on-off structure is conductive.

[0011] The relative movement between the movable contact and the fixed contact is only approaching and separating, and there is no friction and wear between the movable contact and the fixed contact, which is beneficial to improving the service life.

[0012] Preferably, it further includes a reset magnet. There are multiple reset magnets, and the sum of the number of reset magnets and driving magnets is equal to the number of on-off structures. The reset magnet is used to disconnect the on-off structure.

[0013] By adopting the above technical solution, when the driving magnet faces the target on-off structure, the reset magnet faces other on-off structures, ensuring that the movable contact and the fixed contact are quickly separated, so that other on-off structures are reliably disconnected, which is beneficial to the reliable operation of the rotary switch.

[0014] Preferably, the movable magnet moves radially along the rotating shaft.

[0015] By adopting the above technical solution, the radial movement of the movable magnet combined with magnetic force drive realizes non-contact on-off control.

[0016] Preferably, the magnetic force between the movable magnet and the driving magnet is attractive.

[0017] By adopting the above technical solution, all the movable magnets have the same magnetic poles facing the axis of the rotating shaft. The like poles of all the movable magnets repel each other, so that the magnetic force between the movable magnets makes the movable magnets tend to move away from the rotating shaft, that is, each on-off structure tends to be in an off state.

[0018] The magnetic force between the driving magnet and the movable magnet of the target on-off structure is attractive, and this magnetic force makes the driving magnet keep facing the target on-off structure, which is beneficial for the rotary switch to maintain the current gear position.

[0019] Preferably, the on-off structure further includes an elastic member. The elastic member is connected between the base body and the movable magnet, and the elastic member is used to form a distance between the movable contact and the fixed contact.

[0020] By adopting the above technical solution, in the case of not being affected by the driving magnet, the elastic member can keep the movable contact and the fixed contact separated, thus avoiding mis-triggering caused by accidental contact between the two.

[0021] When the action of the driving magnet disappears, the elastic member can quickly return to its original state, ensuring that the movable contact moves away from the fixed contact in time, and improving the working reliability and stability of the rotary switch.

[0022] Preferably, the on-off structure includes a reed switch.

[0023] By adopting the above technical solution, the reed switch is used to realize the conduction and disconnection of the circuit.

[0024] Compared with the way of frequent contact and friction between the moving contact and multiple static contacts in the traditional rotary switch, this solution avoids the direct contact and wear between mechanical components, and significantly improves the service life of the product.

[0025] At the same time, the reed switch has a fast response speed and can quickly realize the switching of the circuit state, improving the overall performance of the rotary switch.

[0026] Preferably, a positioning structure is further included. When any on-off structure is conducted by the driving magnet, the positioning structure is used to prevent the relative rotation between the rotating shaft and the base body.

[0027] By adopting the above technical solution, the stability of the current on-off state of the rotary switch is ensured, accidental switching caused by external vibration is avoided, and the reliability of the rotary switch during operation is improved.

[0028] In summary, the present application includes at least one of the following beneficial technical effects: The on - off of the circuit is achieved through the interaction between the driving magnet and the on - off structure, avoiding the direct contact and friction between the traditional moving contact and the static contact, significantly reducing the degree of wear, and effectively prolonging the overall service life of the rotary switch; The relative movement between the movable contact and the fixed contact is only approaching and separating, and there is no frictional wear between the movable contact and the fixed contact, which is beneficial to improving the service life; In the case of not being affected by the driving magnet, the elastic member can keep the movable contact and the fixed contact separated, thus avoiding mis - triggering caused by accidental contact between the two. Brief Description of the Drawings

[0029] Figure 1 It is a schematic cross - sectional structure diagram of the rotary switch.

[0030] Figure 2 It is a schematic diagram of the positioning structure.

[0031] Figure 3 It is a schematic cross - sectional structure diagram of the rotary switch in Embodiment 2 of the present application.

[0032] Figure 4 It is a schematic diagram of the on - off structure in Embodiment 2 of the present application.

[0033] Description of the Reference Numerals: 1, base body; 2, rotating shaft; 21, card slot; 3, driving magnet; 4, on - off structure; 41, fixed contact; 42, movable contact; 43, movable magnet; 44, elastic member; 5, positioning structure; 51, clamping block; 52, spring; 6, reset magnet. Detailed Description of the Embodiment

[0034] The following further details the present application with reference to the accompanying drawings.

[0035] Refer to Figure 1 , the embodiment of the present application discloses a rotary switch, including a base body 1, a rotating shaft 2, a driving magnet 3 and an on - off structure 4.

[0036] The rotating shaft 2 is rotatably connected to the base body 1.

[0037] The driving magnet 3 is connected to the outer peripheral surface of the rotating shaft 2.

[0038] The on - off structure 4 is connected to the base body 1. There are multiple on - off structures 4, and all the on - off structures 4 are circumferentially distributed along the rotating shaft 2.

[0039] When the center of the on - off structure 4, the center of the driving magnet 3 and the axis of the rotating shaft 2 are coplanar, and the center of the on - off structure 4 and the center of the driving magnet 3 are on the same side of the axis of the rotating shaft 2, the driving magnet 3 makes the on - off structure 4 conduct.

[0040] Refer to Figure 2, the rotary switch further includes a positioning structure 5. When the driving magnet 3 causes any one of the on-off structures 4 to conduct, the positioning structure 5 is used to prevent relative rotation between the rotating shaft 2 and the base 1.

[0041] In one embodiment: The positioning structure 5 includes a clamping block 51 and a spring 52.

[0042] The clamping block 51 is slidably connected to the base 1 along the radial direction of the rotating shaft 2. The spring 52 is connected between the clamping block 51 and the base 1, and the spring 52 causes the clamping block 51 to tightly abut against the rotating shaft 2.

[0043] A card slot 21 is provided on the outer peripheral surface of the rotating shaft 2, and the number of the card slots 21 is greater than or equal to the number of the on-off structures 4.

[0044] When the driving magnet 3 causes any one of the on-off structures 4 to conduct, the spring 52 causes the clamping block 51 to be embedded in the card slot 21.

[0045] Embodiment 1 of the present application Refer to Figure 1 , the on-off structure 4 includes a reed switch.

[0046] When the rotary switch is used as a signal source and the rotary switch is connected to a controller such as a PLC, the reed switch can be used to achieve conduction and disconnection of the circuit.

[0047] Embodiment 2 of the present application Refer to Figure 3 and Figure 4 , when the rotary switch needs to carry a large current, the rotary switch further includes a reset magnet 6.

[0048] The reset magnet 6 is connected to the outer peripheral surface of the rotating shaft 2. There are multiple reset magnets 6, and the sum of the number of the reset magnets 6 and the driving magnet 3 is equal to the number of the on-off structures 4.

[0049] The reset magnet 6 is used to disconnect the on-off structure 4.

[0050] The on-off structure 4 includes a fixed contact 41, a movable contact 42, and a movable magnet 43.

[0051] The fixed contact 41 is fixedly connected to the base 1. The movable contact 42 is connected to the movable magnet 43. The movable magnet 43 is slidably connected to the base 1 along the radial direction of the rotating shaft 2.

[0052] The fixed contact 41 is located on one side of the movable magnet 43 facing the axis of the rotating shaft 2, and the movable contact 42 is located at the end face of the movable magnet 43 facing the axis of the rotating shaft 2.

[0053] The magnetic force between the movable magnet 43 and the driving magnet 3 is attractive. The magnetic force between the movable magnet 43 and the reset magnet 6 is repulsive.

[0054] When the movable magnet 43 is under the magnetic force of the driving magnet 3, the movable magnet 43 approaches the rotating shaft 2 and the movable contact 42 touches the fixed contact 41.

[0055] When the movable magnet 43 is under the magnetic force of the reset magnet 6, the movable magnet 43 moves away from the rotating shaft 2 and the movable contact 42 separates from the fixed contact 41.

[0056] All the poles of the movable magnets 43 facing the axis of the rotating shaft 2 are the same, and the like poles of all the movable magnets 43 repel each other, so that the magnetic force between the movable magnets 43 makes the movable magnets 43 tend to move away from the rotating shaft 2, that is, each on-off structure 4 tends to be in an off state.

[0057] To further improve the reliability of disconnection, the on-off structure 4 further includes an elastic member 44.

[0058] The elastic member 44 is connected between the base body 1 and the movable magnet 43, and the elastic member 44 is used to form a spacing between the movable contact 42 and the fixed contact 41. The elastic member 44 can adopt a helical spring 52.

[0059] The magnetic force between the driving magnet 3 and the movable magnet 43 of the target on-off structure 4 is attractive, and this magnetic force makes the driving magnet 3 keep facing the target on-off structure 4, which is beneficial to the rotary switch to maintain the current gear. Therefore, if there are limitations (such as limited by the installation space), the positioning structure 5 can be cancelled in the second embodiment of the present application.

[0060] The implementation principle of a rotary switch in an embodiment of the present application is: the on and off of the circuit are realized through the interaction between the driving magnet 3 and the on-off structure 4, avoiding the direct contact and friction between the traditional moving contact and the static contact, significantly reducing the wear degree, and effectively prolonging the overall service life of the rotary switch; The relative movement between the movable contact 42 and the fixed contact 41 is only approaching and separating, and there is no friction and wear between the movable contact 42 and the fixed contact 41, which is beneficial to improving the service life; When not under the action of the driving magnet 3, the elastic member 44 can keep the movable contact 42 and the fixed contact 41 in a separated state, thus avoiding mis-triggering caused by accidental contact between the two.

[0061] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A rotary switch, characterized in that: It comprises a seat body (1), a rotating shaft (2), a driving magnet (3) and an on-off structure (4). The rotating shaft (2) is rotatably connected to the base body (1). The driving magnet (3) is connected to the outer peripheral surface of the rotating shaft (2). There are a plurality of the on-off structures (4), and all of the on-off structures (4) are distributed along the circumference of the rotating shaft (2). When the center of the on-off structure (4), the center of the driving magnet (3), and the axis of the rotating shaft (2) are coplanar, and the center of the on-off structure (4) and the center of the driving magnet (3) are located on the same side of the axis of the rotating shaft (2), the driving magnet (3) causes the on-off structure (4) to be conductive.

2. The rotary switch according to claim 1, characterized in that: The on-off structure (4) comprises a fixed contact (41), a movable contact (42) and a movable magnet (43). The fixed contact (41) is connected to the base body (1). The movable contact (42) is connected to the movable magnet (43). The movable magnet (43) is slidably connected to the base body (1). When the movable magnet (43) is acted upon by the magnetic force of the driving magnet (3), the movable contact (42) touches the fixed contact (41).

3. The rotary switch according to claim 2, characterized in that: It also includes a reset magnet (6), There are a plurality of reset magnets (6), and the sum of the number of the reset magnets (6) and the number of the drive magnets (3) is equal to the number of the on-off structures (4). The reset magnet (6) is used to disconnect the on / off structure (4).

4. The rotary switch according to claim 2, characterized in that: The movable magnet (43) moves in the radial direction of the rotating shaft (2).

5. The rotary switch according to claim 4, characterized in that: The magnetic force between the movable magnet (43) and the driving magnet (3) is attraction.

6. The rotary switch according to claim 2, characterized in that: The on-off structure (4) further comprises an elastic member (44), The elastic member (44) is connected between the seat body (1) and the movable magnet (43), and the elastic member (44) is used to form a distance between the movable contact (42) and the fixed contact (41).

7. The rotary switch according to claim 1, characterized in that: The on-off structure (4) comprises a reed switch.

8. The rotary switch according to any one of claims 1 to 7, characterized in that: It also includes a positioning structure (5), When the driving magnet (3) causes any on-off structure (4) to be turned on, the positioning structure (5) is used to prevent the relative rotation between the rotating shaft (2) and the seat body (1).

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